@drubin312804: The licensing for Power Gallery allows you to use it on One Live Domain and one test domain.
This licensing is mentioned on the Power Gallery FAQ page:
A: When you purchase PowerGallery, you receive a single license to set up PowerGallery on one live domain. The serial number can be activated on a testing domain (i.e. localhost) in addition to your live domain allowing you to configure and customize your site prior to going live.
If you install the gallery on one domain, then decide you no longer what to use it there, we can always reset the activations for you to allow it to be moved to the other server.
We also offer a discounted price for the purchase of additional licenses, contact the sales department at email@example.com to purchase additional licenses.
@sinan: Our records show that you purchased Power Gallery v1 on 11/23/2009, before the licensing change took effect. I have updated the serial number for that serial number to allow additional activations.
Upon purchasing the upgrade to Power Gallery 2 on 9/16/2011, you agreed to the Single domain licensing terms for that version.